Firefox Community Forum

I've recently done a clean reinstall of Windows 11 and have noticed that, only for firefox (134.0.2, build ID 20250120135430), a few videos playback without any audio, yet the same videos play with audio when using edge as a comparison. Most (if not all) of these videos did play with audio in firefox prior to this reinstall.

Firstly, I'm pretty sure this is not a windows sound mixer issue since many videos on the same page and tab play back with audio just fine in firefox. The same goes for it not relating to the firefox setting 'Speaker selection', under (burger) > settings > privacy & security > Permissions because videos of different formats (or using different players) on the same page play back audio fine. The tab is not muted. Again, some videos on the same browser tab play audio fine; some of a particular format or player only play the video, while missing the audio (and where Edge plays the same video with audio).

Another common and potentially relevant issue I've seen is that, this being a 'Windows 11 N" install, it was initially missing the settings > system > optional features > Media feature pack, but that is now something I've successfully added. I should add that windows did report problems when I initially tried to add the media feature pack but, after a very long delay, it eventually appeared to succeed when I ran a couple of DISM incantations that I think ended with - "dism /online /add-capability /capabilityname:Media.MediaFeaturePack~~~~0.0.1.0"

I have the 'Play DRM-controlled content' setting enabled.

Comparing the firefox vs edge video playback on this video test page - https://tools.woolyss.com/html5-audio-video-tester/ I get the following results (don't know how to get it formatted/aligned correctly, sorry) -

                           FF vid    FF audio    Edge vid    Edge audio
av1-opus-sita.webm          Works     Works       Works       Works
vp9-vorbis-spring.webm      Works     Works       Works       Works
vp8-vorbis-sintel.webm      Works     Works       Works       Works
avc-aac-nerdist-friends.mp4 Works     MISSING     Works       Works
avc-aac-big-buck-bunny.m4v  Works     MISSING     Works       Works
avc-mp3-sita.mov            Works     Works       Works       Works

And perhaps also relevant is that there's also a difference in the audio-only samples further down the table on the same page -

                   FF audio   Edge audio
audio-sample.mp3    Works      Works
audio-sample.weba   Works      Works
audio-sample.ogg    Works      Works
audio-sample.opus   Works      Works
audio-sample.flac   Works      Works
audio-sample.wav    Works      Works
audio-sample.m4a    FAILS      Works
ac192.mp3           Works      Works
spoonradio-hd.aac   FAILS      Works
audio.opus          Works      Works

Also, every 'v.redd.it' / reddit-video-player video plays the video fine but has no sound when using firefox but plays both sound and video fine with Edge. Here's one for example - https://old.reddit.com/r/funny/comments/1i7y1nr/rock_paper_scissors/

I've seen lots of similar (but not identical) issues on firefox video with no audio problems with suggestions a few things to try. In addition to what I've already mentioned above, I've tried the following without success -

- Restarting windows - Restarting firefox - Restarting firefox with addons/extensions disabled - 'about:support' > Refresh firefox - 'about:support' > Clear startup cache - (hamburger) > more tools > task manager > (click the little profile icon for the page playing the video) - I've checked the settings suggested here: https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues#w_check-some-firefox-settings

I realise it may be possible to side-step this problem by flailing around with more drastic work-arounds like trying a clean re-install of windows or a full uninstall and clean of firefox, but that doesn't really help figure out the problem, which leaves the possiblity it could easily happen again to me or others when it might be something that can be more properly fixed or guarded against in firefox itself, so I hope someone can suggest what might be done to home in on identifying the cause of the problem and so learn whether a more precise fix can be employed.

A video of what is happening . This only happens when I search something up, for example, if I search more than one thing up on Pinterest, Google and sometimes Youtube . . . I'm sure it's not related to any extensions, the only one I installed recently was Privacy Possum, but after noticing this issue I deleted it and it didn't resolve the issue.

Help me Please it's Killing my Eyes

With Respect, Thomas Snell

Problem: when I make new firefox window(launch .exe, drag a tab out, shift+left click link...), there is tiny gap between screen edge and new firefox window. (fullscreen works ok)

Expected behavior: no gap between screen border and new firefox window

Image 1: firefox window snapped to right. Image 2: new firefox window after minimize right-snapped window. Image 3: firefox window across left screen border. Image 4: new firefox window after minimize across-left-border window.

Tried: edit&delete xulstore.json, reset firefox, uninstall and reinstall firefox. still same issue

https://passport-v2.advanceagro.net/login?serviceid=5015 Pls restore this Company any link service.

Hello, Thanks in advance for your help. I am having trouble logging into "trusted" web sites with Firefox and every update seems to add to my problem. By "trusted" web sites I mean sites like Charles Schwab, Spectrum and iCloud as well as my city's water department and my local hospital's portal. It doesn't matter whether I use "normal" Firefox or its privacy mode or safe mode-the problem persists. I am running Firefox version 134.0.2 but the problem goes back several months. I have Windows 10 and use Malwarebytes Browser Guard. The only other add on I use is Print Friendly & PDF. It doesn't matter whether these addons are running or not. The problem seems to involve either a loop, blank fields or very odd error messages. Some examples are below:

iCloud allows me to get to the point where it asks me to supply the 6 digit verification code. I enter the code and the site loads. Approximately 2 seconds later, before I can navigate to anything in iCloud, I am taken back to the log in screen to start over. The loops repeat as often as I want to try. Clearing cache and history does nothing. Since there is nothing abnormal (no error message or blank fields) I have not included a screen shot.

Spectrum allows me to enter my credentials waits a while and then gives me an odd error message about Feature Unavailable and suggests that I try logging in from home. I might add that all of these problems occur while I AM at home. Screen shot attached.

Charles Schwab allows me to get to the log in screen but the screen is unusable. There is a message that the session has timed out and I need to log in. The log in sections of the screen are blank which leads me to believe that the page is not loading all the way but that is a guess. Screen shot is attached.

I can log into all these pages with Edge (which I dislike using) with no problems at all.

I have Firefox set to automatically delete cookies and site data when closed. Privacy is set to Standard.

I would really appreciate any help that you can give me. Please note that the screen shots are BMP files that I had to rename to GIF files to get them to upload.

Thanks again,

Charley

For a few months, and I've seen this happen randomly over the last 5-10 years - pressing enter doesn't work, and sometimes dragging a new link into the empty tab space next to the tabs creates a new tab with the URL in the URL box, but not 'opened'

Does firefox have some issue with loading a web page?

I use ublock origin on default settings, and violent-monkey and stylish for scripting.. but would that disable searching google from a new tab?

Apparently I sync'd from the wrong direction (machine) and my old MBP now has only one default container now. The dozen or so containers I had have disappeared. You need to be clearer in your directions and define the use cases. In my case I want to port over FF from an old MAC to a new MAC. This would include my settings, configuration history, folders, bookmarks, extensions, homepage, and my containers to a new MBP - so it looked like the old one. Eek I thought it would be smarter and see that the new MBP was a newer version and had no configuration. Now I have blown away the containers and have to remake them. I also notice now that my settings - home page, history are not the same yet so I will have to look into what is going on there.

I am disappointed with the way this is going. Your initial master sync should be clear, there is no way to see if it is done or running or completed the initial sync. Honestly, the master sync should be treated differently from intermittent syncs anyway. Now the containers on my old MBP are has changed to the original 5 or so default containers, all of my containers are definitely gone! I logged out of mozilla, since it is apparently breaking my good version of FF.

Please clear up the documentation and include the use case of porting to a new machine to include Containers.